While I was good with the initial arguments against BOI - Congress’s foreign affairs and national security powers; the Commerce Clause; or Congress’s taxing power - I kind of like the fourth amendment argument better "unwarranted search and seizure" [well, let's go with 'search' anyway] despite the 11th Circuit's view, or perhaps that of Thomson Reuters.

 Corporate Transparency Act Reaches the 11th Circuit (thomsonreuters.com)

Put simply, does the government have the right to know everything you own?

"Yes, we've granted you a privilege to operate."

"No, one for which I've already paid a license fee and a tax, not to mention the numerous SRO fees; an SRO which is widely recognized by the public."

I don't register my bicycle just because I ride on town roads, my gas grill just because it emits carbon, my fishing rod just because I fish in a state pond.  [Well, ok, I'm only half right on that one.  It's the pond and the fish the government lays claim to, not the pole.]  But I have no intention of inventorying my tangible and intangible property every year just to stick it on a form and send it in.  Do you really need to know I still own that Barcalounger I bought in 1974?

In short, property rights belong to the states - so the saying goes.  Let's let them decide.  Because we all know what will happen if it's left to the states.